module.exports = function getUUID() {
    var d = new Date().getTime();
    var uuid = "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function(
      c
    ) {
      var r = (d + Math.random() * 16) % 16 | 0;
      d = Math.floor(d / 16);
      return (c === "x" ? r : (r & 0x3) | 0x8).toString(16);
    });
    return uuid;
}